text: const baseUrl = 'https://baas.kinvey.com';
  const appKey = 'kid_SJHj-_qhH';  
  const appSecret = 'e8cc086877a345e780fab684939b7098';
  
  function makeAuth(type) {
      return type === 'Basic'
          ? 'Basic ' + btoa(`${appKey}:${appSecret}`)
          : 'Kinvey ' + sessionStorage.getItem('authtoken');
  }
  
  function makeHeaders(method, data, type) {
      const headers = {
          method,
          headers: {
              'Content-Type': 'application/json',
              Authorization: makeAuth(type),
          },
      };
  
      if(method === 'POST' || method === 'PUT'){
          headers.body = JSON.stringify(data);
      }
  
      return headers;
  }
  
  function handleError(res){
      if(res.status === 409) {
          alert('This username is already used!');
      }
      if (!res.ok) { 
          throw new Error(`Something went wrong! Status: ${res.status}, Status text: ${res.statusText}`);
      }
      if(res.status === 204){
          return res;
      }
      
      return res.json();
  }
  
  function fetchData(module, endpoint, headers) {
      return fetch(`${baseUrl}/${module}/${appKey}/${endpoint}`, headers)
          .then(handleError);
  }
  
  export function get(module, endpoint, type) {
      const headers = makeHeaders('GET', type);
      return fetchData(module, endpoint, headers);
  }
  
  export function post(module, endpoint, data, type) {
      const headers = makeHeaders('POST', data, type);
      return fetchData(module, endpoint, headers);
  }
  
  export function put(module, endpoint, data, type) {
      const headers = makeHeaders('PUT', data, type);
      return fetchData(module, endpoint, headers);
  }
      
  export function del(module, endpoint, type) {
      const headers = makeHeaders('DELETE', type);
      return fetchData(module, endpoint, headers);
  }